Renamed CustomSeam to SeamPlacer, move to a separate file

src/libslic3r/GCode/SeamPlacer.hpp

@@ -0,0 +1,51 @@
+#ifndef libslic3r_SeamPlacer_hpp_
+#define libslic3r_SeamPlacer_hpp_
+
+#include "libslic3r/ExPolygon.hpp"
+#include "libslic3r/PrintConfig.hpp"
+
+namespace Slic3r {
+
+class PrintObject;
+class ExtrusionLoop;
+class Print;
+namespace EdgeGrid { class Grid; }
+
+class SeamPlacer {
+public:
+    void init(const Print& print);
+
+    bool is_custom(size_t layer_id) const {
+        return ! ((m_enforcers.empty() || m_enforcers[layer_id].empty())
+                && (m_blockers.empty() || m_blockers[layer_id].empty()));
+    }
+
+    Point get_seam(const size_t layer_idx, const SeamPosition seam_position,
+                   const ExtrusionLoop& loop, Point last_pos,
+                   coordf_t nozzle_diameter, const PrintObject* po,
+                   bool was_clockwise, const EdgeGrid::Grid* lower_layer_edge_grid);
+
+private:
+    std::vector<ExPolygons> m_enforcers;
+    std::vector<ExPolygons> m_blockers;
+
+    std::map<const PrintObject*, Point>  m_last_seam_position;
+
+    // Get indices of points inside enforcers and blockers.
+    void get_indices(size_t layer_id,
+                    const Polygon& polygon,
+                    std::vector<size_t>& enforcers_idxs,
+                    std::vector<size_t>& blockers_idxs) const;
+
+    void penalize_polygon(const Polygon& polygon,
+                          std::vector<float>& penalties,
+                          const std::vector<float>& lengths,
+                          int layer_id) const;
+
+    static constexpr float ENFORCER_BLOCKER_PENALTY = 1e6;
+};
+
+
+}
+
+#endif // libslic3r_SeamPlacer_hpp_